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Cambrian period

(Encyclopedia) Cambrian period [Lat. Cambria =Wales], first period of the Paleozoic geologic era (see Geologic Timescale , table) extending from approximately 570 to 505…

Cambrian Mountains

(Encyclopedia) Cambrian Mountains kăm´brēən [key], rugged upland plateau occupying most of Wales; Aran Fawddwy (2,970 ft/905 m) is the highest point in the mountains. The area has deep…

Brewer's: Cambrian

Pertaining to Wales; Welsh. (See above.) The Cambrian mountains, like far clouds, That skirt the blue horizon, dusky rise. Thomson: Spring, 961-62. Source: Dictionary of Phrase and…

Brewer's: Cambrian Series

(in geology). The earliest fossiliferous rocks in North Wales. So named by Professor Sedgwick. Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894CambricCambrian A B C D E…

Conwy

(Encyclopedia) Conwy, formerly Conway, town (1981 pop. 12,969), Conwy, N Wales, at the mouth of the Conwy (Conway) River. Conwy is a picturesque tourist town with several notable…

Dee

(Encyclopedia) Dee, Welsh Dyfrdwy, river, c.70 mi (110 km) long, rising in the Cambrian Mts., Gwynedd, NW Wales, and flowing NE through Llyn Tegid (Bala Lake), then meandering…

Sedgwick, Adam

(Encyclopedia) Sedgwick, Adam, 1785–1873, English geologist. He was a professor at Cambridge from 1818. His most important work was a study, made with R. I. Murchison , of the…

Priapulida

(Encyclopedia) Priapulida, phylum consisting of 17 species of predatory, unsegmented marine worms that live in the sand and mud at the sea bottom. The largest are 4 to 6 in. (10–17 cm)…

trilobite

(Encyclopedia) trilobite trī´ləbīt˝ [key], subphylum of the phylum Arthropoda that includes a large group of extinct marine animals that were abundant in the Paleozoic era. They…

Paleozoic era

(Encyclopedia) Paleozoic era pā˝lēəzō´ĭk [key], a major division (era) of geologic time (see Geologic Timescale , table) occurring between 570 to 240 million years ago. It is…